JP2951266B2 - Ladder prop support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder support, and more particularly to a ladder support capable of substantially adjusting the length of a ladder support.

[0002]

2. Description of the Related Art A ladder usually has a shape in which horizontal beams (leg steps) are provided at arbitrary intervals between two right and left columns (vertical frames, vertical beams). It is used leaning against structures and buildings.

[0003]

However, in these conventional ladders, a pair of columns have the same length on the left and right on the assumption that the ladder is used on a flat ground or a floor.
When placing the left and right supports on the sloped ground, uneven terrain, rough terrain, steps of stairs, etc., one support of the ladder floats in the air and the ladder tilts or falls,
It is unstable and people cannot go up and down. For this reason, in order to compensate for the lack of the length of one of the columns, the column has been placed on an appropriate table. However, without a suitable solid platform, the ladder becomes unstable, and the ladder may fall or slip. For this reason, there is a lot of danger when the worker goes up and down the ladder, and the safety is impaired. Therefore, the worker cannot go up and down the ladder safely. Accordingly, an object of the present invention is to eliminate the drawbacks of the above-described conventional example and to provide a ladder support device that can safely lift and lower the ladder even on an inclined ground, a stepped ground, or the like. is there.

[0004]

According to a first aspect of the present invention, a first and second clamps mounted on one of a pair of columns of a ladder are provided. A first auxiliary column locked by the first and second clamps, third and fourth clamps attached to the other column of the pair of columns of the ladder, and locked by the third and fourth clamps; and a second auxiliary strut that, the first class
The hollow of the first crossbar where the pump is fixed between a pair of columns of the ladder
Connected to one end of a first rod inserted into the
A third clamp is connected to the other end of the first rod.
And the second clamp is fixed between a pair of columns of the ladder.
Of the second rod inserted into the hollow portion of the second horizontal rail
And the fourth clamp is connected to the second rod
The ladder support is connected to the other end of the ladder.

According to the structure of the first aspect of the invention, the first auxiliary column is locked by the first and second clamps mounted on one of the pair of columns of the ladder, while the pair of columns of the ladder are locked. Of the third and fourth attached to the other of the columns
Since the second auxiliary column is locked by the clamp, the position of the first auxiliary column and the second auxiliary column is adjusted according to the inclination and unevenness of the ground so that the posture of the ladder does not tilt left and right. Can be In addition, the first rod
Inserted into the hollow part of the first horizontal beam fixed between a pair of columns
And connect the first and third clamps to both ends of the first rod.
So that the first and third clamps are firmly
Can be fixed to a pillar. Similarly, ladder the second rod
Inserted into the hollow part of the second horizontal rail fixed between a pair of struts
And connect the second and fourth clamps to both ends of the second rod.
So that the second and fourth clamps are securely attached to the ladder.
Can be fixed to a pillar.

[0006]

[0007]

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway front view of the first embodiment. 2 shows a front view of a main part of the embodiment, FIG. 3 shows a plan view of the main part of the embodiment, and FIG. 4 shows a bottom surface of the main part of the embodiment. The ladder 10 shown in FIGS.
The horizontal rails 15, 16 and the like are fixed between the three at predetermined intervals.
The leg end 12 supports the lower end of the column 11, and the leg end 14 supports the lower end of the column 13. Rods 20
Are inserted into the hollow portions 15a and 16a. A circular handle 21 is formed at the left end of the rod 20 in the figure, and the clamp 2
7 is connected to the left end of the rod 20 in the figure. Bolt 2
2 is screwed into a screw hole 20a at the right end of the rod 20 in the figure, and a clamp 28 is connected to the right end of the bolt 22 in the figure.
The nut 23 is fixed to the ladder 10 by screwing to the bolt 22 and tightening the gap between the rods 11 and 13 and the rod 20 via the large washer 24. In addition, the strip-shaped plate 2
5 is bolt 22 (strip-like plate 25) by a set of nuts 26.
(Not shown). ), The screw engagement between the rod 20 and the bolt 22 can be loosened by turning the handle 21 while holding the strip-shaped plate 25. For this reason, it becomes easy to remove the rod 20 from the ladder 10.

[0009] The pipe-shaped auxiliary support 31 is provided with two clamps 2.
7 is fixed in parallel with the support 11. Leg end 32
Supports the lower end of the column 31. On the other hand, the pipe-shaped auxiliary support 33 is fixed in parallel with the support 13 by two clamps 28. A leg end piece 34 supports the lower end of the column 33. In the clamp 27, the movable part 27b is
The rivet 27e is rotatably attached to the base 27a, and the bolt 27c is rotatably attached to the base 27a about the rivet 27f. When the nut 27d screwed to the bolt 27c is tightened, the clamp 27 can lock the auxiliary support 31 between the base 27a and the movable part 27b. The structure of the clamp 28 is the same as that of the clamp 2 described above.
7 is the same as the structure of FIG.

With the above configuration, the first auxiliary column 31 is locked by the first and second clamps 27 attached to one column 11 of the pair of columns of the ladder 10, while the pair of columns of the ladder 10 are paired. Since the second auxiliary column 33 is locked by the third and fourth clamps 28 attached to the other column 13 of the columns, the first auxiliary column 31 and the second auxiliary column 33 are locked.
The position of the first and second auxiliary struts 31, 33 is adjusted appropriately in accordance with the inclination and unevenness of the ground 41 by adjusting the locking position of the ladder 10 so that the posture of the ladder 10 is changed to the left and right (the horizontal beam 15, 16 longitudinal direction). Further, since the first rod 20 is inserted into the hollow portion 15a of the first horizontal bar 15 and the first clamp 27 and the third clamp 28 are connected to both ends of the first rod 20, the first clamp 27 In addition, the third clamp 28 can be firmly fixed to the columns 11, 13 of the ladder 10. Similarly, the second rod (same as the first rod) 20 is connected to the second cross rail 1
6, the second clamp 27 and the fourth clamp 28 are connected to both ends of the second rod 20, so that the second clamp 27 and the fourth clamp 28 are firmly connected to the ladder 10. It can be fixed to the columns 11 and 13.
For this reason, even if the ground 41 is inclined, the auxiliary struts 31,
By adjusting the position at which 33 is fixed to ladder 10 by clamps 27 and 28, ladder 10 can be used stably. In FIG. 1, since the ground 41 is downwardly to the right in the figure, the position of the auxiliary support 33 is not
It is below the position of 1.

FIG. 5 shows a modification of the place of use of the first embodiment. In FIG. 2, a side groove 43 is formed in the ground 42. In the ground 42, the right side of the side groove 43 in the figure is lower than the left side of the side groove 43 in the figure. The column 13 of the ladder 10 is located on the side groove 43, but the columns 31, 3
3, the ladder 10 can be used stably despite the presence of the side groove 43.

FIG. 6 shows a second embodiment of the present invention. A rod 20b shown in FIG. 6 is a modified example of the rod 20 in the first embodiment. The rod 20b is inserted into the hollow portions 15a, 16a of the horizontal rails 15, 16.
The bolt 22a is in the screw hole 20c at the left end of the rod 20b in the figure.
, And the clamp 27 is fixed to the bolt 22a. On the other hand, the bolt 22b is screwed into the screw hole 20d at the right end of the rod 20b in the figure, and the clamp 28 is fixed to the bolt 22b. The nut 23a screwed to the bolt 22a abuts the support 11 of the ladder 10 via the large washer 24a, and the nut 23b screwed to the bolt 22b abuts the support 13 of the ladder 10 via the large washer 24b. For this reason, by tightening the nuts 23a and 23b, the rod 20b
Can be fixed to the ladder 10. Further, similarly to the first embodiment, the auxiliary columns 31 and 33 are
By fixing the ladder 10 at 7, 28, the ladder 10 can be used stably on an inclined ground (corresponding to the ground 41 in FIG. 1) as in the first embodiment. In this case, the handle 21, the strip-shaped plate 25, and the like in the first embodiment are omitted, the rod 20b is reduced in weight and size, and is used as a permanent attachment for the auxiliary columns 31, 33. However, even if it is permanent, if the use of the ladder 10 is changed and this attachment becomes unnecessary, use a wrench, a wrench, etc.
b can be removed from the ladder 10.

FIG. 7 shows a third embodiment. In the ladder 50 shown in FIG.
5, 56, 57, etc. are fixed. The leg ends 52 support the lower part of the column 51, and the leg ends 54 support the lower part of the column 53. The mounting portion 61a of the two clamps 61 is
Are attached to the main body by bolts 61b and 61c. Further, mounting portions 62a of the two clamps 62 are mounted on the support columns 53 by bolts 62b and 62c. The auxiliary column 63 is fixed in parallel to the column 51 by two clamps 61. Leg ends 64 support the lower part of the auxiliary column 63. Further, an auxiliary column 65 is fixed in parallel to the column 53 by two clamps 62. Leg ends 66 support the lower part of the auxiliary column 65. In addition, 44 is the ground.

With the above configuration, the clamps 61 and 62 are permanently provided on the columns 51 and 53 of the ladder 50. Others are the same as the above-described first embodiment. In this case, since the left side of the ground 44 in the figure is lowered, the position of the auxiliary support 63 is lower than the position of the auxiliary support 65.

FIG. 8 shows a fourth embodiment. FIG. 8A shows a plan view of the mounting plate, and FIG. 8B shows a state in which the clamp is fixed to the support of the ladder using the mounting plate. 8A and 8B, the first mounting plate 72
The second mounting plate 73 is fixed to the side surface of one of the columns 71 of the ladder 70 in a state of being sequentially laminated. The first mounting plate 72 has holes 72a extending downward from the top in the figure.
Hole 72b, hole 72c, hole 72d, hole 72e, hole 72f,
Holes 72g and 72h are formed, and a hole 73i, a hole 73a, a hole 7
3b, hole 73c, hole 73d, hole 73e, hole 73f, hole 7
3g, 73h and 73j are formed.

A bolt 74 is provided in a hole 73b of the second mounting plate 73,
It is inserted so as to penetrate the hole 72b of the first mounting plate 72 and the hole 71a of the column 71, and is fixed with a nut 75.
Similarly, the bolt 76 is inserted into the hole 73g of the second mounting plate 73,
It is inserted so as to penetrate the hole 72 g of the mounting plate 72 and the hole 71 b of the column 71, and is fixed with a nut 77. The clamp 78 is fixed to the second mounting plate 73 via a hole 73i by a bolt 78a, and the clamp 79 is fixed to the second mounting plate 73 via a hole 73j by a bolt 79a.
The clamps 78 and 79 fix the auxiliary support 80 (corresponding to the auxiliary support 33) as in the first embodiment.
Note that, similarly to the column 71, an auxiliary column is fixed to the other column (not shown) of the ladder 70 (which is a pair with the column 71) by a clamp.

With the above configuration, the first and second mounting plates 7
The clamps 78 and 79 are supported by the supports 7 and
1, and the auxiliary column 80 is locked by clamps 78 and 79. Similarly, on the other support (not shown) of the ladder 70 (which is a pair with the support 71), an auxiliary support is fixed by a clamp similarly to the support 71. Others are the same as the above-described first embodiment. When the ladder 70 is made of wood or fiberglass, the ladder 70
Of the ladder 70 is not a hollow shape.
The mounting plates 72 and 73 are separately mounted on the first and second mounting plates. For this purpose, a total of four bolt holes are drilled in the left and right columns 71 of the ladder 70 with a drill or the like, and the mounting plates 72 and 73 as permanent attachments are fixed to the columns 71. In the fourth embodiment, the number of components is smaller than that of the second embodiment, and the weight can be reduced. On the other hand, the use of the ladder 70 itself is changed, and the clamps 78 and 79 are used. When the attachment metal fitting is unnecessary and removed, the bolt holes 71a and 71b of the support column 71 remain.

FIG. 9 illustrates the leg end piece 82 (corresponding to the leg end piece in each of the above embodiments). In FIG. 8, a bolt 84 rotatably connects a lower portion of a ladder support or an auxiliary support 81 to a leg end piece 82. For this reason, the leg end piece 82 supports the lower end of the support column 81 via the bolt 84. The direction of the leg end piece 82 can be freely changed according to the condition of the ground. Further, a non-slip 83 is added to the lower surface of the leg end piece 82.

[0019]

According to the ladder support aid of the first aspect of the present invention, even if the ground on which the ladder is installed is inclined,
The ladder can be prevented from tilting left and right. Therefore, the ladder can be stabilized even on an inclined ground. Furthermore, if auxiliary stanchions are attached to each of the left and right stanchions of the ladder, it is possible to secure the necessary leg length of the ladder stanchion corresponding to any ground surface such as an uneven surface, an inclined surface, and a stair surface. . Therefore, the ladder can be stably leaned. In addition, the locking position of the left and right auxiliary struts can be easily adjusted corresponding to the step on the ground up to about 30 cm left and right. Furthermore, since the auxiliary column is attached to the column with a clamp, the difference between the locking positions of the left and right auxiliary columns can be adjusted in millimeter units. Further, since the column support aid of the ladder of the present invention has a strong structure, the original strength of the ladder is not impaired. Further, when the auxiliary strut is attached to the outside of the pair of struts of the ladder, the width of the strut is substantially increased, so that the landing width of the ladder is increased. For this reason, the stability of the ladder is improved. Further, the ladder support device of the present invention can be used even on flat ground. Furthermore, the ladder
The strut aid can be firmly fixed to the ladder posts.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a first embodiment of the present invention.

FIG. 2 is a front view of a main part of the first embodiment.

FIG. 3 is a plan view of a main part of the first embodiment.

FIG. 4 is a bottom view of a main part of the first embodiment.

FIG. 5 is a modification of the use of the first embodiment.

FIG. 6 is a front view of a main part of the second embodiment.

FIG. 7 is a front view of the third embodiment.

FIG. 8 is an explanatory diagram of a fourth embodiment.

FIG. 9 is a perspective view of a leg end piece used in each of the embodiments.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ladder 11, 13 Prop 15 Horizontal beam 15a Hollow portion of horizontal beam 16 Horizontal beam 16a Hollow portion of horizontal beam 20 Rod 27, 28 Clamp 31, 33 Auxiliary column

Claims (1)

(57) [Claims] 1. A first and a second clamp attached to one of a pair of columns of a ladder, a first auxiliary column locked by the first and second clamps, and a pair of the ladders And a third auxiliary column fixed to the other of the columns, and a second auxiliary column locked by the third and fourth clamps , wherein the first clamp is provided between a pair of columns of the ladder. No. fixed to
One end of the first rod inserted into the hollow part of one horizontal rail
And the third clamp is connected to the other end of the first rod.
The second clamp is connected to an end of the ladder.
The second inserted in the hollow part of the second horizontal rail fixed between the columns
The fourth clamp is connected to one end of a rod,
It is connected to the other end of the second rod.
Ladder of posts aids that.